Other downloaders and file management tools
This weekend, I linked to a good blog post about how to download everything that matters to you. Here are a couple tools I, personally, use which can add to that:
scdl
This is Soundcloud Music Downloader - a command line tool for downloading tracks from their Soundcloud pages. It does precisely what it claims to! If you have ever used command line yt-dlp then this will be easy for you to pick up.
Beets
Once you've ripped all your CDs, you should tag those files correctly so that you can find and enjoy them in your collection. I used Beets for this, and wrote about my experience here. It is a tool which demands a lot of slow and specific attention - you should put a lot of time into using this tool, but you'll be pleased with the results, I think. For the first time, my music collection - which I've been building since high school, since I never picked up spotify or another streaming service - is manageable, well-organized, and searchable.
Stacher
A GUI for yt-dlp! It makes it much, much easier to handle that tool. It even has a feature which allows you to subscribe to youtube channels and download everything they put out.
The itch downloader
If you are worried about losing the itch games you like, just download the app and grab em all right now. This will show you every game in your library, including ones which are delisted from search, and you can just download them and sit on them. I used to have a big folder of games from itch and elsewhere on one of my old computers so I took an hour or so and rebuilt it with the ones I like on my new computer. I think it shows the ones you spent money on, and I don't think it shows everything from every megabundle you ever got, but it's a great way to stop.
Personally, I do not believe there is a reason to freak the fuck out about itch stuff - I think the number of people who are being bizarrely harassing to itch right now is really actually very limited, and it seems like the phonecalling campaign is actually doing really well. But it still seems good to me, in this current political climate, to grab everything you like and have space for... and sit on it.